Average BER of coherent optical QPSK systems with phase errors over M turbulence channels
The average bit-error rate performance is studied for a coherent free-space optical communication system employing differentially encoded quadrature phase shift keying with the Mth-power phase estimation method. A closed-form expression, considering the combined effects of the M turbulence fading, pointing errors and phase estimation errors, is derived in terms of the Meijer''s G function. Numerical and Monte Carlo simulation results are presented to verify the derived expression.
Hu Jiashun,Zhang Zaichen,Wu Liang,Dang Jian,Zhu Guanghao. Average BER of coherent optical QPSK systems with phase errors over M turbulence channels[J].Chinese Optics Letters,2018,16(12):12.